Sen. Jeff Flake (R-Ariz.) warned Sunday that he and other senators may block approving judges "until we get a vote, for example, on tariffs." (Toya Sarno Jordan / Getty Images)

A Republican lawmaker threatened to block President Trump judicial nominees unless there’s a congressional vote on tariffs and other major issues.

“I think myself and a number of senators, at least a few of us, will stand up and say, ‘Let’s not move any more judges until we get a vote, for example, on tariffs,’ ” Sen. Jeff Flake (R-Ariz.) told ABC News' George Stephanopoulos on Sunday.

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Flake, who is not seeking reelection, has been a vocal critic of Trump. The Arizona lawmaker serves on the Judiciary Committee, where Republicans have a razor-thin, one-seat majority at 11-10.

“On something like tariffs, for example, the Senate ought to bring legislation to the floor that says, ‘Hey, we’re going to push back here.’ … Canada, Mexico are not national security threats,” Flake said. “The European Union exporting cars to the U.S. does not represent a national security threat, and we ought to push back. And if we don’t, why are we there?”

Some Republicans are opposed to President Trump’s tariffs on countries in the European Union, and Canada and Mexico. They contend the tariffs will cripple the economy and hurt allies.

Sen. Bob Corker (R-Tenn.) has proposed legislation to limit the President’s ability to set tariffs based on “national security grounds.”

“There’s not a person at the White House that can articulate why they are doing this,” Corker told CBS’ “Face the Nation.”